No personnel may access SCP-XXXX without approval from at least one member of the O5 Council.

I think a Site Director or leading researcher would be more reasonable. To have an O5 be involved in signing approval might be deemed borderline excessive.

Personnel given access to SCP-XXXX are to be re-designated as Class D-XXXX personnel.

If personnel would have accessed to it end up as D-class, why not have D-class view it from the get-go? Furthermore, the idea of demoting to D-class is outdated among the readership. It is not realistic for the Foundation to turn valuable talents into human guinea pigs.

visual- or audio-based

Why not just write "visual-audio"?

Instead, they will enter a dreamscape consisting of a grocery store, invariably recognized as a "Rosa Mart,

So they will have a consistent vivid dream?

the Class D-XXXX individual

I think "individual" in general will do better. As it is, you're like implying that only D-class will be affected.

Upon waking, Class D-XXXX personnel who have made purchases will find a receipt detailing their purchases.

As food for thought, how are the receipts found? Where would they be found?

Alright, an ad that brings people to a vivid dream where they can buy stuff… One issue I find with this is how can the Foundation be sure about what happened in the dreams of affected people. I mean, there is a likelihood one might choose to lie or omit certain details of the vivid dream. Of course, the receipt becomes more important as a piece of that certainty. That said, description of the shop outlet would have some uncertainty attached to it.

As such, I would suggest to leave out description of the shop and its operations to the addenda. Keep the mysterious receipts (and maybe common points from the dreams, that imply that the dream setting is constant) in the main description. But use interviews and transcripts in the addenda to tie in the bits and show what kind of business they are.

But overall, I find this draft to be rather basic. You have the effect and the pieces in place, but I do not find it entirely interesting yet. The dream store is a decent starting point, but I think it would be notable to see some of those products and the associated prices. What kind of unconventional prices and currencies are there in use, for example? How would Marty deduce which currency is appropriate for each person?

To address your first point, I'd like to say that there's a hidden truth behind the article. The reason O5 permission is required is the same reason that the SCP is Euclid instead of Safe.

As for how to designate the people affected by SCP-XXXX, it does manifest itself as a rather big problem. The original way I wrote it, which is also, I believe, the "correct" way to write it, is to use class E personnel, designating someone who has been affected by an anomaly, and should not be exposed to other anomalous activity. The problem, however, is that the Class E designation is very little-used, and may be a bit clunky. I'm not really sure what the best way is to address this issue.

Why not just write "visual-audio"?

First, it would be "audiovisual." Second, that would imply that the memetic effect only takes place if both the visual and audio data are observed. Which, actually, I kinda like. I think I'll do that.

So they will have a consistent vivid dream?

The dream isn't necessarily more vivid than a normal dream, though certain physical laws such as object permanence do take place. The dream, however, always occurs.

As food for thought, how are the receipts found? Where would they be found?

Well, my general thought is that the receipt would be in the subject's left-hand pocket upon waking, but I think that's largely just because I always put receipts in my left-hand pocket. I think it's generally more personal than that, but the only consistent rule is that, wherever the receipt ends up, it is invariably found.

Several shoppers are agents of the Foundation, and would only lie or omit details regarding anything they're deliberately keeping secret from the Foundation. This does not include the general floor-plan, which can also be seen briefly in the advertisement. Debriefing reports invariably coincide with the floor-plan seen in the video. Of course, by definition, all the shoppers have seen the video, and thus have the same visual understanding of the floor-plan.

I will say that my first two drafts included several items and associated prices, though it was later stated that the information was boring and added nothing to the article. Some included a framed Last Supper for 40 dollars and an original-print first-issue Spider-Man comic for 10 yen. As for currencies, Marty will take whatever you've got; however, he does prefer to take what the buyer recognizes as money. The only major exception to that is during major economic down-turns, when the money isn't really worth anything and he can't get you the low, low prices that you have come to expect from Rosa Mart. At times like that, he will happily accept salt, water, human bones, flesh, gold, silver, cobalt, [DATA EXPUNGED], or anything else that is recognized as a currency at any point in this or any Euclidean spacetime.

But this has given me a few ideas on some places I can expound a little on what's going on, and hint at the deeper truth without completely giving it away.

EDIT: Complete overhaul of the containment procedures, and added an extra footnote in the transcript.